Dreambird

what size npt thread tap do I need to install the stock 1992 third gen oil pressure sender into the ls1 oil pan block off above the oil filter?

Brando5641

iTrader: (-1)

The stock sending unit on the back of the block at the top works with the 3rd gen guage.

Just sayen

Dreambird

Which wire my engine is a lq4 engine and computer the oil sender on it has 3 wires i tried splicing into 2 of them and my gauge pegged out with both when i turned the key on?

25th327RS

iTrader: (2)

Not sure about the 3 wire lq sending unit. Most others ( I as well) just use the 99-02 truck or ls1 oil pressure sender, and the thirdgen oil pressure sender plugs right in and works as is.

Dreambird

I have it wired to the computer as it shows in the schematic does the computer not need the signal? If i switch senders it will be a single wire then correct?

25th327RS

iTrader: (2)

PCM doesn't need to see oil pressure, atleast any of the ones I have done, don't. A single wire plug and sender is all you need, that will feed your guage directly through the c100 firewall connector

Dreambird

Thanks!

jazzdadss

I used the stock 98 oil sender. Two wires, one to ground and the other to c100. Works great!

Brianbajnuth

V6 or v8 sender?

redmaroz

iTrader: (4)

When I ordered the 98 ls1 oil pressure sensor it was for a v8 and it was a 2 prong.

Brianbajnuth

How did you hook it up to the gauge? Did it work?
One prong to ground and the other to the gauge?

redmaroz

iTrader: (4)

I have not hooked it up yet becuase i am still in the process of the swap, but i ordered the pigtail for the 2 prong connector from eficonnection. I am going to connect it to my 3rd gen gauge and ground it. Ill post up the part number for the pigtail later, I dont have it with me at this second.

redmaroz

iTrader: (4)

https://www.eficonnection.com/eficon...px?ItemId=1421

Part #:100-00815

Here you go, hope that helps some.

camarotucker

iTrader: (2)

Quoted from "Pocket"


Take a broken ls1 oil sender and drill/tap the alum base to 1/8npt

Alternately, find a m12 to 1/8npt adapter

Brianbajnuth

I did as pocket said and I'm pretty happy!
Brock the ls1 sender tap it with a 1/8 npt tap and screwed it in worked perfect

scooter

iTrader: (11)

X2

Pocket

iTrader: (24)

Thats the 98 oil sender. Not sure why the PN keeps floating around, but it does. Works the same as later LSx senders. 99-02 Fbodys and 99-05ish trucks used 1 wire senders

98 senders use a 4wd vacuum sw connector from a S10. Top middle pin (A) is gauge, bottom grd. All single wire connectors use pin A for gauge. late 3rd gens use a similar connector with 3 wires. The ORN and GRY or TAN/WHT wires were a FP relay bypass and not used for the conversion

Later LSx and corvettes used sensors which are not compatible with 3rd gen gauges. Those are visually much shorter and used a connector similar to the TPS